Has anyone gotten a T-Mobile SIM working with Audi Connect (for 2015 model year and newer, Audi went with AT&T as a provider for their SIM cards). I am able to swap the AT&T SIM out and a data connect does establish, WiFi hot spot, and Google maps all work, however, all of the Connect services time out. I'd rather not spend $20/mo for ATT, when I can get a tablet T-Mo SIM for $10/mo.

I believe that the T-Mobile APN is not permitted by the Audi back-end or maybe it's an IPv6 thing?

I did notice that the APN when using the AT&T provided SIM is (as expected) different - APN1.AUDIUSA.COM vs FAST.T-MOBILE.COM

There are a few articles out there on the net for other carriers and even pay as you go, but nothing really documents it very well. I suppose going down the "supported" path is what I will do, but Audi sort of forces you down the AT&T route...not much customer choice is there?

I did see that article carlostech - but if you look closely, this is for a US Mobile SIM. I actually got LTE working with a T-Moble SIM and was able to have the map update and tether via WiFi - but the Audi Connect features (Fuel Prices, Flight Updates, etc) did not work...just timed out. I wonder if it had anything to do with T-Mo being all IPv6...most likely it was that or Audi did not let the T-Mo APN in to their servers.